Infrared photometry, bolometric luminosities, and effective temperatures for giant stars in 26 globular clusters

Astronomy and Astrophysics – Astronomy

Scientific paper

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Giant Stars, Infrared Astronomy, Infrared Photometry, Stellar Luminosity, Stellar Temperature, Astronomical Catalogs, Bolometers, Globular Clusters, Hertzsprung-Russell Diagram, Late Stars, Stellar Spectrophotometry

Scientific paper

Infrared observations of 307 giant stars in 26 globular clusters are presented. The effects of H2O absorption on the infrared colors are examined. The color-color correlations and color-magnitude diagrams, derived using an internally consistent set of distance moduli and reddenings, identify specific clusters with problematical reddenings or low quality optical data. The mean behavior of the color-color relationships is, in all cases, in good agreement with our earlier work.

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